Question # 1

In YDS experiment, fringe spacing means the distance between two consecutive _________ fringes

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Bright

Dark

Any of A or B

None of these

The locus of all the points in the same phase of vibration is called

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Wave pocket

Wavefront

Wave number

None of these

The terms phase difference and path difference are

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Same

Different

Equal

none of these

The wave nature of light was proposed by

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Newton

Thomas Young

Huygen

None of these

Light waves are

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Transverse waves

Longitudinal waves

Compressional

None of them wave

Two sources are said to be coherent if they have

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Same amplitude

Same wavelength

Definite phase relation with each other

None of them

Wavelength of red colour as compared to that of violet colour is

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Smaller

Longer

Equal

None of these

Monochromatic light means wave of

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Same frequency

Same colour

Same Wavelength

All of them

Frequency of red colour as compared to that of violet colour is

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Equal

Smaller

Greater

None of these

Light waves are

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Mechanical waves

Electromagnetic waves

Any of above

None of above

The speed of the secondary wavelets as mentioned in Huygen's principle is ________ the speed of propagation of the wave itself

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Equal to

Greater than

Smaller than

None of these

Huygen's principle states that

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Light travels in straight line

Light has dual nature

Either of these

None of these

Light has

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Wave nature

Dual nature

Particle nature

None of them

To observe interference of light, the condition, which must be met with is that the sources must be

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Monochromatic

Phase coherent

Both of above

None of above

Angle between ray of light and the corresponding wavefront is

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0⁰

60⁰

90⁰

120⁰

In case of destructive interference of two waves, the amplitude of the resultant wave will be __________ either of the waves.

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Greater than

Smaller than

Equal to

None of these

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ECAT Physics Chapter 10 Optical Instruments Online Test MCQs With Answers

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